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Description

A flaw has been found in LMCache up to 0.4.6. This affects the function hex_hash_to_int16 of the file lmcache/integration/vllm/utils.py of the component KV Cache Handler. Executing a manipulation can lead to use of weak hash. The attack needs to be launched locally. The attack requires a high level of complexity. It is indicated that the exploitability is difficult. The exploit has been published and may be used. The pull request to fix this issue awaits acceptance.

PUBLISHED Reserved 2026-06-04 | Published 2026-06-04 | Updated 2026-06-04 | Assigner VulDB




LOW: 2.0CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
LOW: 3.6CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R
LOW: 3.6CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R
2.4AV:L/AC:H/Au:S/C:N/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Use of Weak Hash

Risky Cryptographic Algorithm

Timeline

2026-06-04:Advisory disclosed
2026-06-04:VulDB entry created
2026-06-04:VulDB entry last update

Credits

Dem00 (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/368261 (VDB-368261 | LMCache KV Cache utils.py hex_hash_to_int16 weak hash) vdb-entry technical-description

vuldb.com/vuln/368261/cti (VDB-368261 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-10813 (CVE-2026-10813 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/831641 (Submit #831641 | LMCache 729ff73 Cache poisoning) third-party-advisory

github.com/LMCache/LMCache/issues/3301 exploit issue-tracking

github.com/LMCache/LMCache/pull/2932 issue-tracking patch

github.com/LMCache/LMCache/ product

cve.org (CVE-2026-10813)

nvd.nist.gov (CVE-2026-10813)

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